1. 用方框中所给单词或短语的适当形式填空。

watch, wide, each, interest, call, long, tell, fire, thousand of, was made of

    The Great Wall of China has a history of over two thousand years. It runs from the east to the west in North China. It is about 6,300 kilometers  . It is often  "The Ten-Thousand-Mile Long Wall". It is one of the "Seven Wonders" of the ancient world.

    The Great Wall is  enough for ten men to walk side by side. Horses can also run along it, too. The Great Wall  stones and bricks (砖). There are huge stones on  side and on the highest part. But now some sections of it are worn out.

    There are tall watchtowers along the Great Wall. Once upon a time, the soldiers kept  the enemies (敌人) in the watchtowers day and night. They made  on the towers to  each other when the enemies came.

    Nowadays we don't use the Great Wall to keep away the enemies any more. It is a famous place of to all the people in the world. Every yearpeople come to visit it from all over the world.